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https://issues.apache.org/jira/browse/LOG4J2-2784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17042686#comment-17042686
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ASF subversion and git services commented on LOG4J2-2784:
---------------------------------------------------------
Commit af0ed7f4869876a08b6c8f37c06a1ca477345cd8 in logging-log4j2's branch
refs/heads/release-2.x from Ralph Goers
[ https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=af0ed7f ]
LOG4J2-2784 - Counter stuck at 10 and overwriting files when leading zeros used
in the file pattern count.
> Rolling stuck at counter 10 by RollingFile appender when counter is zero
> padded
> -------------------------------------------------------------------------------
>
> Key: LOG4J2-2784
> URL: https://issues.apache.org/jira/browse/LOG4J2-2784
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.12.1, 2.13.0
> Environment: Windows 10 Pro x64 v1809
> Oracle Java 11.0.3
> Reporter: Petras
> Assignee: Ralph Goers
> Priority: Major
>
> We are using rolling file appender with SizeBasedTriggeringPolicy. The
> counter in file name is padded with 0. We observed that Log4j2 RollingFile
> appender does not increment the counter beyond 10 and overwrites the 10th
> rolled file.
> Simple test case:
> {code:java}
> import org.apache.commons.lang3.RandomStringUtils;
> import org.apache.logging.log4j.LogManager;
> import org.apache.logging.log4j.Logger;
> public class LogTest {
> private static final Logger logger = LogManager.getLogger("LogTest");
> public static void main(String[] args) throws Exception
> {
> for (long i=0; ; i+=1) {
> logger.info("Sequence: " + i);
> logger.debug(RandomStringUtils.randomAscii(128, 512));
> Thread.sleep(250);
> }
> }
> }
> {code}
> The log4j2.xml configuration:
> {code:xml}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="debug" verbose="true" dest="err" name="XmlProperties">
> <Properties>
> <Property name="baseFilename">rolling_test.log</Property>
> <Property name="pattern">%d{HH:mm:ss.SSS} [%t] %-5level %logger{1.} -
> %msg%n</Property>
> </Properties>
> <Appenders>
> <Console name="Console" target="SYSTEM_OUT">
> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level
> %logger{36} - %msg%n"/>
> </Console>
> <RollingFile name="RollingFile" fileName="${baseFilename}"
> filePattern="${baseFilename}.%02i" immediateFlush="true" append="true">
> <PatternLayout pattern="${pattern}"/>
> <Policies>
> <SizeBasedTriggeringPolicy size="1 KB"/>
> </Policies>
> <DefaultRolloverStrategy max="99"/>
> </RollingFile>
> </Appenders>
> <Loggers>
> <Logger name="LogTest" level="trace"/>
> <Logger name="org.apache.logging.log4j.status" level="trace"/>
> <Root level="info">
> <AppenderRef ref="Console" level="info"/>
> <AppenderRef ref="RollingFile"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
> Log4j2 creates the files:
> {code}
> rolling_test.log
> rolling_test.log.01
> rolling_test.log.02
> rolling_test.log.03
> rolling_test.log.04
> rolling_test.log.05
> rolling_test.log.06
> rolling_test.log.07
> rolling_test.log.08
> rolling_test.log.09
> rolling_test.log.10
> {code}
> When counter 10 is reached, {{rolling_test.log.10}} file is being overwritten
> when rolled.
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